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  • Shimano BB-UN300 Bottom Bracket - 68-122.5mm (LL123) 68-122.5mm
  • A good quality bottom bracket for traditional chainsets
  • Super-accurate bearings for smooth operation and improved durability
  • Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting
  • Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life
  • Fast and easy installation without adjustment
  • Narrow body allows clearance for cable routing under the bottom bracket
  • 68-122.5mm shell width compatibility
Shimano

BB-UN300 Bottom Bracket - 68-122.5mm (LL123)

7 Reviews7 total reviews

SKU: BBUN300B23 / Barcode: 4550170619251
A good quality bottom bracket for traditional chainsets Super-accurate bearings for smooth operation and improved durability Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting Maintenance-free sealed cartridge Read more
Sale price £10.95 Regular price RRP £24.99 SAVE 56%
Size 68-122.5mm
In stock

90 Day Returns

  • A good quality bottom bracket for traditional chainsets
  • Super-accurate bearings for smooth operation and improved durability
  • Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting
  • Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life
  • Fast and easy installation without adjustment
  • Narrow body allows clearance for cable routing under the bottom bracket
  • 68-122.5mm shell width compatibility

Customer Reviews

4.7
Rated 4.7 out of 5 stars
Based on 7 reviews
Total 5 star reviews: 6 Total 4 star reviews: 0 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
86%would recommend this product
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7 reviews
  • AH
    Andy Holbrook (.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 years ago
    New Shimano BB-UN300 Bottom Bracket

    Excellent quality spare part. Well packaged and promptly sent. Fitted perfectly, got me back on the road again, thank you.

    Was this helpful?
  • NW
    Nigel W.
    Verified Buyer
    Rated 3 out of 5 stars
    1 month ago
    Excellent Shimano product

    Tried and tested square taper bottom bracket.

    Alway my go to choice if possible.

    Was this helpful?
  • MS
    Martin S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    5 months ago
    Remarkable Value

    A very good price indeed for the Shimano bottom bracket. Straightforward, no hassle ordering with good delivery service.

    I'll check in again for the next bike part needs for sure.

    Thanks Martin

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  • MS
    michael salmon (.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 years ago
    replace worn out bottom bracket,

    only size that fits .

    my cycle .

    Was this helpful?
  • KJ
    Krzysztof Jeromkin EVie Workshop (.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 years ago
    Bottom bracket

    Good quality stuff and quick delivery 👌 👍

    Was this helpful?

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